Title:
DRIVING METHOD AND DRIVING DEVICE FOR SINGLE-PHASE ALTERNATING-CURRENT SYNCHRONOUS MOTOR
Document Type and Number:
WIPO Patent Application WO/2011/129297
Kind Code:
A1
Abstract:
The phase (φia) of a winding current (ia) is found from the measured value of the winding current (ia). Counter electromotive voltage (ea) is found from the measured value of motor voltage (Va), and the phase (φea) of the counter electromotive voltage (ea) is found. The phase difference between the phase (φia) of the winding current (ia) and the phase (φea) of the counter electromotive voltage (ea) is found as ψa= φea- φia, and the present load angle (θpv) is found as θpv=90°-ψa. The value of motor voltage (V) (Va, Vb) to an inductor motor is adjusted so as to satisfy θpv=θsp. Consequently, high efficiency can be always maintained regardless of adjustment and secular changes without using a single-phase inverter and a position sensor.
Inventors:
NARITA HIROAKI (JP)
TAKAHASHI HISASHI (JP)
TAKAHASHI HISASHI (JP)
Application Number:
PCT/JP2011/058995
Publication Date:
October 20, 2011
Filing Date:
April 11, 2011
Export Citation:
Assignee:
YAMATAKE CORP (JP)
NARITA HIROAKI (JP)
TAKAHASHI HISASHI (JP)
NARITA HIROAKI (JP)
TAKAHASHI HISASHI (JP)
International Classes:
H02P6/18; H02P6/06; H02P6/08; H02P6/182
Foreign References:
| JPH10146090A | 1998-05-29 | |||
| JP2007028779A | 2007-02-01 |
Attorney, Agent or Firm:
YAMAKAWA, Masaki et al. (JP)
Masaki Yamakawa (JP)
Masaki Yamakawa (JP)
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Claims: